package com.qingxin.sys.utils;

import java.io.IOException;

import javax.servlet.http.HttpServletResponse;

/**
 * Http响应处理类
 */
public final class ResponseUtil {
	
	
	/**
	 * 发送文本，使用UTF-8编码
	 * @param response
	 * @param text
	 */
	public static void renderText(HttpServletResponse response, String text) {
		render(response, "text/plain;charset=UTF-8", text);
	}

	
	/**
	 * 发送json，使用UTF-8编码
	 * @param response
	 * @param text
	 */
	public static void renderJson(HttpServletResponse response, String text) {
		render(response, "application/json;charset=UTF-8", text);
	}

	
	/**
	 * 发送xml，使用UTF-8编码
	 * @param response
	 * @param text
	 */
	public static void renderXml(HttpServletResponse response, String text) {
		render(response, "text/xml;charset=UTF-8", text);
	}

	
	/**
	 * 发送指定格式内容，使用UTF-8编码
	 * @param response
	 * @param contentType
	 * @param text
	 */
	public static void render(HttpServletResponse response, String contentType, String text) {
		response.setContentType(contentType);
		response.setHeader("Pragma", "No-cache");
		response.setHeader("Cache-Control", "no-cache");
		response.setDateHeader("Expires", 0);
		try {
			response.getWriter().write(text);
		} catch (IOException e) {
			e.printStackTrace();
		}
	}
	
	
}
